Powerful carbon fiber heating technology. 6 hours of continuous heat. One click start with 3 heat levels. 5 heat zones. Nanotechnology Graphene-Infused inner lining. Lightweight and durable construction with conductive and heat-regulating properties brings revolutionary comfort and performance for daily use. Wear it under your regular jacket without adding bulk. Machine washable, just remove the battery. Safe and durable ultra thin carbon fiber heating technology. Super soft nylon outer. Cozy micro fleece lined collar. Two zippered handwarmer pockets. Includes quick-charge power bank with Type C USB output and 20W quick-charger. Replacement battery available (sold separately).